C++ (Cpp) InsertDeletePDFPage Examples

Example #1

File: fpdf_edit_doc.cpp Project: ouyang789987/PDFium.js

static int InsertNewPage(CPDF_Document* pDoc, int iPage, CPDF_Dictionary* pPageDict, CFX_DWordArray &pageList)
{
    CPDF_Dictionary* pRoot = pDoc->GetRoot();
    if (!pRoot) {
        return -1;
    }
    CPDF_Dictionary* pPages = pRoot->GetDict(FX_BSTRC("Pages"));
    if (!pPages) {
        return -1;
    }
    int nPages = pDoc->GetPageCount();
    if (iPage < 0 || iPage > nPages) {
        return -1;
    }
    if (iPage == nPages) {
        CPDF_Array* pPagesList = pPages->GetArray(FX_BSTRC("Kids"));
        if (!pPagesList) {
            pPagesList = FX_NEW CPDF_Array;
            pPages->SetAt(FX_BSTRC("Kids"), pPagesList);
        }
        pPagesList->Add(pPageDict, pDoc);
        pPages->SetAtInteger(FX_BSTRC("Count"), nPages + 1);
        pPageDict->SetAtReference(FX_BSTRC("Parent"), pDoc, pPages->GetObjNum());
    } else {
        CFX_PtrArray stack;
        stack.Add(pPages);
        if (InsertDeletePDFPage(pDoc, pPages, iPage, pPageDict, TRUE, stack) < 0) {
            return -1;
        }
    }
    pageList.InsertAt(iPage, pPageDict->GetObjNum());
    return iPage;
}

Example #2

File: fpdf_edit_doc.cpp Project: primiano/pdfium-merge

static int InsertDeletePDFPage(CPDF_Document* pDoc,
                               CPDF_Dictionary* pPages,
                               int nPagesToGo,
                               CPDF_Dictionary* pPage,
                               FX_BOOL bInsert,
                               CFX_ArrayTemplate<CPDF_Dictionary*>& stackList) {
  CPDF_Array* pKidList = pPages->GetArray("Kids");
  if (!pKidList) {
    return -1;
  }
  int nKids = pKidList->GetCount();
  for (int i = 0; i < nKids; i++) {
    CPDF_Dictionary* pKid = pKidList->GetDict(i);
    if (pKid->GetString("Type") == "Page") {
      if (nPagesToGo == 0) {
        if (bInsert) {
          pKidList->InsertAt(i, new CPDF_Reference(pDoc, pPage->GetObjNum()));
          pPage->SetAtReference("Parent", pDoc, pPages->GetObjNum());
        } else {
          pKidList->RemoveAt(i);
        }
        pPages->SetAtInteger("Count",
                             pPages->GetInteger("Count") + (bInsert ? 1 : -1));
        return 1;
      }
      nPagesToGo--;
    } else {
      int nPages = pKid->GetInteger("Count");
      if (nPagesToGo < nPages) {
        int stackCount = stackList.GetSize();
        for (int j = 0; j < stackCount; ++j) {
          if (pKid == stackList[j]) {
            return -1;
          }
        }
        stackList.Add(pKid);
        if (InsertDeletePDFPage(pDoc, pKid, nPagesToGo, pPage, bInsert,
                                stackList) < 0) {
          return -1;
        }
        stackList.RemoveAt(stackCount);
        pPages->SetAtInteger("Count",
                             pPages->GetInteger("Count") + (bInsert ? 1 : -1));
        return 1;
      }
      nPagesToGo -= nPages;
    }
  }
  return 0;
}

Example #3

File: cpdf_document.cpp Project: hfiguiere/pdfium

void CPDF_Document::DeletePage(int iPage) {
  CPDF_Dictionary* pPages = GetPagesDict();
  if (!pPages)
    return;

  int nPages = pPages->GetIntegerFor("Count");
  if (iPage < 0 || iPage >= nPages)
    return;

  std::set<CPDF_Dictionary*> stack = {pPages};
  if (InsertDeletePDFPage(this, pPages, iPage, nullptr, FALSE, &stack) < 0)
    return;

  m_PageList.RemoveAt(iPage);
}

Example #4

File: fpdf_edit_doc.cpp Project: primiano/pdfium-merge

void CPDF_Document::DeletePage(int iPage) {
  CPDF_Dictionary* pRoot = GetRoot();
  if (!pRoot) {
    return;
  }
  CPDF_Dictionary* pPages = pRoot->GetDict("Pages");
  if (!pPages) {
    return;
  }
  int nPages = pPages->GetInteger("Count");
  if (iPage < 0 || iPage >= nPages) {
    return;
  }
  CFX_ArrayTemplate<CPDF_Dictionary*> stack;
  stack.Add(pPages);
  if (InsertDeletePDFPage(this, pPages, iPage, NULL, FALSE, stack) < 0) {
    return;
  }
  m_PageList.RemoveAt(iPage);
}